第五课时 万以内数的读写

第五课时 万以内数的读写 教学 内容 财务内部控制制度的内容财务内部控制制度的内容人员招聘与配置的内容项目成本控制的内容消防安全演练内容 : 课本第75页例6及练习十六第1、2、4 题 快递公司问题件快递公司问题件货款处理关于圆的周长面积重点题型关于解方程组的题及答案关于南海问题 。 教学目标: 1、通过本节课的学习，使学生在已有知识的基础上，学会读写万 以内的数(中间、末尾有0)，且能总结出读写万以内数的方法。 2、让学生学习用具体的数描述生活中的事物，并与他人交流，培 养学习数学的兴趣和自信心，逐步发展学生的数感。 教学重难点: 学会读写万以内的数。(末尾，中间有0。) 教学准备: 计数器、收集一些生活中的数据资料。 教学过程: 一、复习准备 1、在下面的每个数的后面接着写出三个数。 (1)569( ) ( ) ( ) (2)1998( ) ( ) ( ) (3)9997( ) ( ) ( ) 2、填空。 (1)在数位顺序 表 关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf 里面，从右边起，第一位是( )，第二位 是( )，第三位是( )，第四位是( )，第五位是( )。 (2)读出下面的数。 368读作( )820读作( )409读作( ) 500读作( ) 4758读作( ) (3)写出下面各数。 一百二十三写作 六百写作 四百五十写作 三百零六写作 五千七百三十写作 二、导入新课 escape from debt of the bank records of actual control of enterprise and its associated spouse obtained credit support strict precautions against serious adverse credit history of borrower (guarantor) and their spouses get the Bank crediting support. Implementation of the guarantee the guarantee personal credit business, investigators should verify a guarantor willing, guarantees or credits (MS) charge status, value and evaluation of liquidity. Arrival (mass) bet property value assessments to assessment company approved by the Bank to assess reported or recognized the value of the Bank confirmation shall prevail; investigators through market price than the reciprocal verification of charge values, prevention assessed value is too high, and so on. Mortgage, status check and to verify ownership, leasing and is imposed by the existence of a relocation, and other special situations. Customer access to Customer Manager product documentation standards set by States should be in accordance with the Bank select borrowers, guarantors and bet. Section II review review-approval staff should perform their duties strictly in accordance with authorized, prohibited Super license. Approval shall, in accordance with authorized, independent approval according to their own knowledge and experience. Review 1、学生汇报课前收集的数据资料情况。 学生自由汇报课前收集的数据资料。一台空调大约是3500元，学校学生人数为1206人，爸爸的工资一个月2630元„„(教师把同学们收集的数据有选择的板 书 关于书的成语关于读书的排比句社区图书漂流公约怎么写关于读书的小报汉书pdf 在黑板上。) 2、观察这些数据，复习数的组成。 让学生选用一个数据，说一说这个数是由几个千、几个百、几个十、几个一组成的。 师:这 些数同学们都知道它的组成，那你们知道这些有什么共同的特点呢, (数中有0。)这些数怎么读、写呢,今天我们就来继续学习万以内的数的读写。 三、讲授新课 教学例6。 1、请学生先在下面试读这些数。 2、请学生读出黑板上的数，教师板书。 如1206读作:一千二百零六。 3、师:读了这些数后你有什么发现, (这些数中，有的0读出来，有的0不读，教师板书后，让学生发现什么样的0要读，什么样的0不要读。) 4、教师分别拨出4305、3003。 (1)看着计数器，写出这个数，请一名学生板演。 (2)再写出这两个数的读法。 (3)说一说你是怎么读、写这两个数的。 5、小组总结:怎样读万以内的数,怎样写万以内的数, 师生小结:我们读数的时候要从高位读起，万位上有几就读几万，千位上有几就读几千„„末尾有的0读不读。中间有0的数不管有几个0都读一个0。 四、巩固练习 1、第76页的“做一做”。 in accordance with authorized, independent approval according to their own knowledge and experience. Reviewapproval staff should perform their duties strictly in accordance with authorized, prohibited Super license. Approval shall, -iewew revmentation standards set by States should be in accordance with the Bank select borrowers, guarantors and bet. Section II revid is imposed by the existence of a relocation, and other special situations. Customer access to Customer Manager product docung anion of charge values, prevention assessed value is too high, and so on. Mortgage, status check and to verify ownership, leasirecognized the value of the Bank confirmation shall prevail; investigators through market price than the reciprocal verificat ted oruation of liquidity. Arrival (mass) bet property value assessments to assessment company approved by the Bank to assess reporal credit business, investigators should verify a guarantor willing, guarantees or credits (MS) charge status, value and evalpersontory of borrower (guarantor) and their spouses get the Bank crediting support. Implementation of the guarantee the guarantee control of enterprise and its associated spouse obtained credit support strict precautions against serious adverse credit hisescape from debt of the bank records of actual 2 2、教师报数，学生写数。 7504 8007 9500 3207 3、写出下面各数。 四千二百二十 五千零四 七千零六十 八千零五十四 (1)学生写出这些数。 (2)请几名学生说出自己写出的数并全班核对。 (3)说一说你怎样判断，每个数中的“0”分别代表着几个“0”。 4、同桌拨数，读写。 一同学拨数，一同学在本子上写出写出这个数的读法和写法，然后再换过来。 五、课堂小结 本节课我们学的是万以内数的读、写方法，大家要记住的是不管是读数还是写数都要从高位往低位读写。写数时一定要看清这个“0”代表的是几个0，即要弄清前后两个数字所在的数位。 六、布置作业 完成本课的练习题。练习十六1.2.4 教学反思: experience. Review in accordance with authorized, independent approval according to their own knowledge andapproval staff should perform their duties strictly in accordance with authorized, prohibited Super license. Approval shall, -arantors and bet. Section II review reviewrs, guaccess to Customer Manager product documentation standards set by States should be in accordance with the Bank select borroweeck and to verify ownership, leasing and is imposed by the existence of a relocation, and other special situations. Customer tus chrket price than the reciprocal verification of charge values, prevention assessed value is too high, and so on. Mortgage, staroved by the Bank to assess reported or recognized the value of the Bank confirmation shall prevail; investigators through many appdits (MS) charge status, value and evaluation of liquidity. Arrival (mass) bet property value assessments to assessment compan of the guarantee the guarantee personal credit business, investigators should verify a guarantor willing, guarantees or crentatioions against serious adverse credit history of borrower (guarantor) and their spouses get the Bank crediting support. Implemerom debt of the bank records of actual control of enterprise and its associated spouse obtained credit support strict precautescape f3 第六课时 万以内数的大小比较 教学内容: 课本第76页例7及练习十六第4、5、10题。 教学目标: 1、通过“比一比”活动，掌握万以内数的大小比较的方法，能够 用正确的符号表示万以内数的大小。 2、通过现实的素材，感受大数的的意义，加深学生对万以内数的认识。 3、培养学生的逻辑思维的能力。 教学重难点: 1、通过比较、理解数位的意义和数的实际大小掌握学会比较10000以内数的大小。 2、掌握万以内数的大小比较的方法，能够正确运用符号表示万以内数的大小关系。 教学准备:计数器、教学挂图。 教学过程: 一、准备活动 1、读一读，并说一说，各个数中的“5”在什么数位上，各表示什么, 257 1059 5791 135 2、填空 ( )个一是十。 ( )个十是一百，10个百是( )，10个( )是一万。 八百七十二是由( )个百、( )个十、( )个一组成的。 8个千、4个十组成的数是( )。 3、在 2287、650、80、285、651、79这几个数中: 是两位数的有( )是四位数的有( )最大的数有( )。最小的数有( )。 二、学习情景的创设 in accordance with authorized, independent approval according to their own knowledge and experience. Reviewapproval staff should perform their duties strictly in accordance with authorized, prohibited Super license. Approval shall, -iewew revmentation standards set by States should be in accordance with the Bank select borrowers, guarantors and bet. Section II revid is imposed by the existence of a relocation, and other special situations. Customer access to Customer Manager product docung anion of charge values, prevention assessed value is too high, and so on. Mortgage, status check and to verify ownership, leasirecognized the value of the Bank confirmation shall prevail; investigators through market price than the reciprocal verificat ted oruation of liquidity. Arrival (mass) bet property value assessments to assessment company approved by the Bank to assess reporal credit business, investigators should verify a guarantor willing, guarantees or credits (MS) charge status, value and evalpersontory of borrower (guarantor) and their spouses get the Bank crediting support. Implementation of the guarantee the guarantee control of enterprise and its associated spouse obtained credit support strict precautions against serious adverse credit hisescape from debt of the bank records of actual 4 1、看挂图 聪聪和妈妈一起去商场买电器，聪聪和妈妈看中了空调和电视机。售货员说空调的价格是由三个千、四个百和三个十组成的。你知道空调的价格吗, 2、引导学生猜出电视机的价格。售货员又告诉我们电视机的价格比1000少，又比500多，你还能猜出电视机的价格吗, 教师根据学生的汇报提示学生“多一些”、“多得多” 3、引导学生进行数的大小比较。 4、今天我们就一起来比一比万以内数的大小。 板书:万以内数的大小比较 三、教学互动活动 (1)提示:想一想我们千以内不同数位大小数比较的方法。 自主探究四位数和三位数的大小比较。 出示1430和980 的大小，同时说一说自己是怎么比的, 引导学生用多种方法比较 小组汇报结果1430大于980。因为1430是四位数，而980是三位数。四位数比三位数大。也就是不同数位的数比较，数位多的数就大。 谁来说说聪聪和妈妈能买到什么电器,你是怎么想的,及时帮助学生理清思路，比较出数的大小。 探究四位数与四位数的大小比较。 出示挂图，聪聪正在和另一个小朋友比赛谁读数的速度快，聪聪得了3864分，另外一个小朋友得了3529分。 (2)小组进行讨论:怎样比较3864和3529 的大小, 汇报得出:因为3864大于3529。所以聪聪获得胜利，是先比较千位一样大，所以比较百位，3864的百位是8比3529的百位5大，所以3864大于3529。 师生总结:比较万以内数的时候，先比数位，数位多的数大， 数位一样从高位比起，最高位大的数就大。 experience. Review in accordance with authorized, independent approval according to their own knowledge andapproval staff should perform their duties strictly in accordance with authorized, prohibited Super license. Approval shall, -arantors and bet. Section II review reviewrs, guaccess to Customer Manager product documentation standards set by States should be in accordance with the Bank select borroweeck and to verify ownership, leasing and is imposed by the existence of a relocation, and other special situations. Customer tus chrket price than the reciprocal verification of charge values, prevention assessed value is too high, and so on. Mortgage, staroved by the Bank to assess reported or recognized the value of the Bank confirmation shall prevail; investigators through many appdits (MS) charge status, value and evaluation of liquidity. Arrival (mass) bet property value assessments to assessment compan of the guarantee the guarantee personal credit business, investigators should verify a guarantor willing, guarantees or crentatioions against serious adverse credit history of borrower (guarantor) and their spouses get the Bank crediting support. Implemerom debt of the bank records of actual control of enterprise and its associated spouse obtained credit support strict precautescape f5 (3)引导学生完成练习十六第5题。理解题意。独立比一比。 汇报比较的结果。用自己的话说一说。 出示:5850和863 7239和7007 2133和3144 5488 和5458 独立比较，集体订正。 四、课外练习 1、在里填上合适的数字。 28?3 ? 2867 7?00>7240 646 > 6?2 ?49 > 413 ?21 > 201 4293 > 4?63 15，7< ?，7 20,20?5 > ?,20?5 2、找规律，填一填。 (1)596、597、( )、 ( )、( ) (2)1720、1730、( )、( )、( ) (3)5000、5100、( )、( )、( ) (4)1360、2360、( )、( )、5360、( ) (5)2130、3240、( )、( )、6570、( ) (6)9999、8888、( ) 、( ) 、5555、( ) 教学反思 第七课时 近似数 教学内容: 课本第77页例8及练习十六第6题。 in accordance with authorized, independent approval according to their own knowledge and experience. Reviewapproval staff should perform their duties strictly in accordance with authorized, prohibited Super license. Approval shall, -iewew revmentation standards set by States should be in accordance with the Bank select borrowers, guarantors and bet. Section II revid is imposed by the existence of a relocation, and other special situations. Customer access to Customer Manager product docung anion of charge values, prevention assessed value is too high, and so on. Mortgage, status check and to verify ownership, leasirecognized the value of the Bank confirmation shall prevail; investigators through market price than the reciprocal verificat ted oruation of liquidity. Arrival (mass) bet property value assessments to assessment company approved by the Bank to assess reporal credit business, investigators should verify a guarantor willing, guarantees or credits (MS) charge status, value and evalpersontory of borrower (guarantor) and their spouses get the Bank crediting support. Implementation of the guarantee the guarantee control of enterprise and its associated spouse obtained credit support strict precautions against serious adverse credit hisescape from debt of the bank records of actual 6 教学目标: 1、通过具体的情景让学生理解近似数的含义，体会近似数在生活 中的作用。 2、通过独立猜测、交流等活动让学生掌握一定猜测的方法，培养 学生的数感和估计能力。 教学重、难点: 1、通过独立猜测、交流等活动让学生掌握一定猜测的方法。 2、培养学生的数感和估计能力。 教学准备:教学挂图。 教学过程: 一、准备练习 1、 接着数数。 1998、( )、( )、( ) 9997、( )、( )、 ( ) 497、( ) ( ) 、( ) 2、按照要求排列下面各数。 1001 996 1008 ( ) > ( ) > ( ) 205 306 402 ( ) < ( ) < ( ) 二、新课教学 1、组织理解近似数的含义。 出示例8的主题图。 聪聪去调查了育英小学的学生数，他写下了这样的一句话: “育英小学有1506人，约是1500人。”育英小学到底有1506 人还是1500人呢,为什么, 组织学生进行讨论、交流。思考:后半句约1500人是什么意思,小组汇报: A、认为育英小学的认数是1506人，因为他告诉我们就是1506 experience. Review in accordance with authorized, independent approval according to their own knowledge andapproval staff should perform their duties strictly in accordance with authorized, prohibited Super license. Approval shall, -arantors and bet. Section II review reviewrs, guaccess to Customer Manager product documentation standards set by States should be in accordance with the Bank select borroweeck and to verify ownership, leasing and is imposed by the existence of a relocation, and other special situations. Customer tus chrket price than the reciprocal verification of charge values, prevention assessed value is too high, and so on. Mortgage, staroved by the Bank to assess reported or recognized the value of the Bank confirmation shall prevail; investigators through many appdits (MS) charge status, value and evaluation of liquidity. Arrival (mass) bet property value assessments to assessment compan of the guarantee the guarantee personal credit business, investigators should verify a guarantor willing, guarantees or crentatioions against serious adverse credit history of borrower (guarantor) and their spouses get the Bank crediting support. Implemerom debt of the bank records of actual control of enterprise and its associated spouse obtained credit support strict precautescape f7 人，后半句他说的是约是1500人，是说他们学校的人数和 1500人的差不多。 B、也认为育英小学有1506人，他说约有1500人是大概就是1500人的意思。 师小结:我们把1506这个很准确的数字就叫做“准确数”，而 1500这个和1506差不多的数就叫做“近似数”。(边说边板书) 引导学生明白近似数更容易记，因为它正好是正百数。 出示例8主题图比较一下1506和1500这两个数，体会一 下准确数和近似数哪个数更容易记住 (2) 聪聪那天不仅调查了育英小学的人数，还调查了新长镇的人 数是9992人，约是( )人，先独立填填，再和你的同桌 交流交流。谁来说说你写出的近似数是多少, 个别汇报: A、约是10000人，因为我觉得9992人接近10000人， B、我写的是“约9990人”因为9992人和9990只相差2。 同学们你们同意哪位写的呢,为什么, 师生小结:我们用近似数就是为了让我们更容易记住，所以， 一般我们都用整百、整千、整万数。 2、请你说说身边的近似数，找找生活中的近似数。按照教师的要 求，先独立想想，再和小组的同学交流。 3、组织活动3——猜一猜。 (1)(练习十六第9题) 提出题中的要求。 请大家独立动脑筋想一想，再和同桌交流看你们手猜的一样 吗,互相说说你们为什么要这样猜。 (2)组织进行集体交流。说一说你猜出来的结果是什么样的,你是怎么猜的, 及时肯定回答好的学生，并帮助学生总结应当怎样猜。 让学生将所准备的卡片，按照教师的要求摆一摆:将所准备的 in accordance with authorized, independent approval according to their own knowledge and experience. Reviewapproval staff should perform their duties strictly in accordance with authorized, prohibited Super license. Approval shall, -iewew revmentation standards set by States should be in accordance with the Bank select borrowers, guarantors and bet. Section II revid is imposed by the existence of a relocation, and other special situations. Customer access to Customer Manager product docung anion of charge values, prevention assessed value is too high, and so on. Mortgage, status check and to verify ownership, leasirecognized the value of the Bank confirmation shall prevail; investigators through market price than the reciprocal verificat ted oruation of liquidity. Arrival (mass) bet property value assessments to assessment company approved by the Bank to assess reporal credit business, investigators should verify a guarantor willing, guarantees or credits (MS) charge status, value and evalpersontory of borrower (guarantor) and their spouses get the Bank crediting support. Implementation of the guarantee the guarantee control of enterprise and its associated spouse obtained credit support strict precautions against serious adverse credit hisescape from debt of the bank records of actual 8 卡片组成三位数或四位数;读一读:同桌相互读摆出的数; 说一说:再互相说一说对方所摆事出的数的组成; 比一比:比较两个数的大小。 三、课外训练 1、组织数学游戏——猜价格/ (1)电视节目“幸运52”猜商品价格的游戏大家看过吗, 其实这样的游戏应用的也是数学知识。今天我们也来玩一玩这样的猜数游戏。 (2)游戏规则:老师给你一个提示，比如这个数几千几百的数， 然后就开始猜，老师提示手中的数比你猜的数大还是小。同学 们再根据这个提示继续猜直到猜对为止。 (3)进行第一轮猜数游戏。 教学反思 第八课时 整百、整千加减法 教学内容: 课本第81页例9。 教学目标: 1、 通过熟悉的买电器的生活情景，提出加减法问题，探索口算整 百、整千的 加减的方法， 经历交算法的过程。 2、 能正确熟练地进行计算，发展口算能力，培养学生的综合应用 experience. Review in accordance with authorized, independent approval according to their own knowledge andapproval staff should perform their duties strictly in accordance with authorized, prohibited Super license. Approval shall, -arantors and bet. Section II review reviewrs, guaccess to Customer Manager product documentation standards set by States should be in accordance with the Bank select borroweeck and to verify ownership, leasing and is imposed by the existence of a relocation, and other special situations. Customer tus chrket price than the reciprocal verification of charge values, prevention assessed value is too high, and so on. Mortgage, staroved by the Bank to assess reported or recognized the value of the Bank confirmation shall prevail; investigators through many appdits (MS) charge status, value and evaluation of liquidity. Arrival (mass) bet property value assessments to assessment compan of the guarantee the guarantee personal credit business, investigators should verify a guarantor willing, guarantees or crentatioions against serious adverse credit history of borrower (guarantor) and their spouses get the Bank crediting support. Implemerom debt of the bank records of actual control of enterprise and its associated spouse obtained credit support strict precautescape f9 能力。 教学重难点: 掌握整百、整千的进(退)位加减法的计算方法。难点:算法的多样和优化。 教学准备:教学挂图。 教学过程: 一、准备练习 出示准备题要求能快速准确地计算出结果。 二、教学新课 1、出示主题图， 引导学生看图。 爷爷去商场买电器，买了一台大电视机，和一台冰箱。 2、根据这幅图提出数学问题。学生自由说一说 问: (1)爷爷一共花了多少钱, (2)电视机和电冰箱哪个的价格贵, (3)买了电冰箱比买电视机多了多少钱, 想一想:要用什么方法来解决, 三、教学新课，探究整百、整千、数的加减的算法 1、根据上面的情况，选择一个你想解决的问题写在课堂练习本上，根据问题列出相应的算式:一共花多少钱,各自进行并汇报 板书算式:2000，1000=( ) 那么，电视机和电冰箱哪个的价格贵,买了电冰箱比买电视机多了多少钱, 先自己独立想一想，再进行小组交流，讲明白你的想法，听懂他人的想法，选择你想计算的算式。板书算式是:2000,1000=( ) 想一想:( )个百加( )个百是( )个百，也就是( );( )个千减( )个千是( )个千，也就是( )。组织学生进行汇报，教师板书算式。 2、组织活动编题口算活动 用这些整百、整千数来进行一次编题口算的活动 引导学生说 in accordance with authorized, independent approval according to their own knowledge and experience. Reviewapproval staff should perform their duties strictly in accordance with authorized, prohibited Super license. Approval shall, -iewew revmentation standards set by States should be in accordance with the Bank select borrowers, guarantors and bet. Section II revid is imposed by the existence of a relocation, and other special situations. Customer access to Customer Manager product docung anion of charge values, prevention assessed value is too high, and so on. Mortgage, status check and to verify ownership, leasirecognized the value of the Bank confirmation shall prevail; investigators through market price than the reciprocal verificat ted oruation of liquidity. Arrival (mass) bet property value assessments to assessment company approved by the Bank to assess reporal credit business, investigators should verify a guarantor willing, guarantees or credits (MS) charge status, value and evalpersontory of borrower (guarantor) and their spouses get the Bank crediting support. Implementation of the guarantee the guarantee control of enterprise and its associated spouse obtained credit support strict precautions against serious adverse credit hisescape from debt of the bank records of actual 10 出一些整百、整千的数将算式写在练习本上。 2人一组，从整百和整千数中任意选出四个数组成一个加法和一个减法算式，将算式写在自己的练习本上。 3、出示:80，50 = 130,50= 要求学生独立完成 在练习本上做做、想想应该怎么算, 4、出示900，600= 9000 ，6000= 1500 ,600= 1500, 600= 组织小组活动，解决问题 集体校正 5、学生完成练习十七第1题。 认真看图，说说图意，自主提问解决问题。 四、练习 a) 你有几种填法,(练习十七第5题) 8?27 >8263 b) ?里填上“> ”、“< ”或“ = ”。 20 ，80 ?40 ，60 5800, 800 ?3600 , 3000 130， 70?200 ，20 700 ,90 ? 700, 80 1200 ,200 ?1000， 200 500 ,50? 400 ，50 90 ，50 ?200 ,60 90 ,60 ?100 ,70 五、课堂总结:通过这节课的学习，你有什么收获,学到了什么知识和本领, 0(。教学反思: experience. Review in accordance with authorized, independent approval according to their own knowledge andapproval staff should perform their duties strictly in accordance with authorized, prohibited Super license. Approval shall, -arantors and bet. Section II review reviewrs, guaccess to Customer Manager product documentation standards set by States should be in accordance with the Bank select borroweeck and to verify ownership, leasing and is imposed by the existence of a relocation, and other special situations. Customer tus chrket price than the reciprocal verification of charge values, prevention assessed value is too high, and so on. Mortgage, staroved by the Bank to assess reported or recognized the value of the Bank confirmation shall prevail; investigators through many appdits (MS) charge status, value and evaluation of liquidity. Arrival (mass) bet property value assessments to assessment compan of the guarantee the guarantee personal credit business, investigators should verify a guarantor willing, guarantees or crentatioions against serious adverse credit history of borrower (guarantor) and their spouses get the Bank crediting support. Implemerom debt of the bank records of actual control of enterprise and its associated spouse obtained credit support strict precautescape f11